CH 2 The Internet and PP Presentations... · 2009. 9. 1. · LAN ( local area network): is a...
Transcript of CH 2 The Internet and PP Presentations... · 2009. 9. 1. · LAN ( local area network): is a...
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The Internet and WWWThe Internet and WWWObjectives:Objectives:
•• Networks LAN/WAN.Networks LAN/WAN.
•• Internet.Internet.
•• How the Internet worksHow the Internet works
•• Explain what the World Wide Web is and Explain what the World Wide Web is and
how it works.how it works.
•• Identify the elements of a Web browser Identify the elements of a Web browser
and explain how the browser works.and explain how the browser works.
•• Tell what determines how fast a Web page Tell what determines how fast a Web page
loads.loads.
•• Create a simple Web document.Create a simple Web document.
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Network:Network:A A computer networkcomputer network is a system for is a system for
communicationcommunication among two or more among two or more
computerscomputers. .
LANLAN ( ( local area network):local area network): is a is a computer networkcomputer networkcovering a local area over short distances , like a covering a local area over short distances , like a home, office or small group of buildings such as a home, office or small group of buildings such as a
college using cables and hardwarecollege using cables and hardware installed on installed on
each computereach computer. . LANs can be interlinked by LANs can be interlinked by connections to form a Wide area network. A connections to form a Wide area network. A routerrouteris used to make the connection between LANs.is used to make the connection between LANs.
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WAN (wide area network):WAN (wide area network): Is a computer Is a computer
network that connects many computers over network that connects many computers over
large distances, using transmission lines large distances, using transmission lines
similar to those used in telephone systems.similar to those used in telephone systems.
Each networking technology moved information Each networking technology moved information
around in a different way, often based on the around in a different way, often based on the
design of its hardware. A particular LAN technology design of its hardware. A particular LAN technology
could only work with specific computers, and most could only work with specific computers, and most
LAN and WAN technologies were incompatible with LAN and WAN technologies were incompatible with
each other.each other.
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What is the Internet?What is the Internet?
•• It is a computer network that connects It is a computer network that connects
millions of computers globally and millions of computers globally and
provides worldwide communication to provides worldwide communication to
businesses, homes, and governments.businesses, homes, and governments.
How the Internet began?
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1957
1962
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1967
1968
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1969
1970
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1971
1972
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1975
1974
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1981
1979
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1983
1982
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1988
1985
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1989
1990
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1994
1993
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1995
1998
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2000
2003
2001
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�� In a network a In a network a Host NodeHost Node, or , or HostHost, is , is
any computer that directly connects any computer that directly connects
to the network. A host often stores to the network. A host often stores
and transfers data and messages on and transfers data and messages on
high speed communication lines and high speed communication lines and
provides network connections for provides network connections for
other computers.other computers.
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Internet ServicesInternet Services
�� World Wide WebWorld Wide Web
�� Electronic mail (eElectronic mail (e--mail)mail)
�� File TransferFile Transfer
�� NewsgroupsNewsgroups
�� Message boardsMessage boards
�� Mailing ListMailing List
�� Chat RoomsChat Rooms
�� Instant MessagingInstant Messaging
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Connecting to the InternetConnecting to the Internet
�� SlowSlow--speed technology:speed technology:
DialDial--up access.up access.
�� HigherHigher--speed Internet connections: speed Internet connections:
DSL (Digital Subscriber Line),DSL (Digital Subscriber Line),
cable modem, cable modem,
fixed wireless, fixed wireless,
satellite modem.satellite modem.
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Access Access ProvidersProvidersISP (Internet ISP (Internet ServiceService ProviderProvider):): isis a a businessbusiness thatthat has a has a permanentpermanentInternet Internet connectionconnection andand providesprovidestemporarytemporary connectionsconnections toto individualsindividualsandand companiescompanies forfor free free oror forfor a a feefee..
Regional ISPRegional ISP: : UsuallyUsually providesprovides accessaccess toto thetheInternet Internet throughthrough oneone oror more more telephonetelephonenumbersnumbers local local toto anan specificspecific geographicalgeographicalareaarea..
NationalNational ISPISP: : LargeLarge businessbusiness thatthat providesprovideslocal local telephonetelephone numbersnumbers in in mostmost majormajor citiescitiestowntown nationwidenationwide. . ExamplesExamples EarthlinkEarthlink, , AT&TAT&T, , WorldComWorldCom..
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OSP (Online Service Provider):OSP (Online Service Provider):
Supplies Internet access but also has Supplies Internet access but also has
many membersmany members--only features that only features that
offer a variety of special content and offer a variety of special content and
services such as: news, weather, services such as: news, weather,
legal information, financial data, legal information, financial data,
hardware and software guides, hardware and software guides,
games and travel guides. Examples. games and travel guides. Examples.
AOL, MSN.AOL, MSN.
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WSP (Wireless Service Provider):WSP (Wireless Service Provider):
Is a company that provides wireless Internet Is a company that provides wireless Internet
access to users with wireless modems or access to users with wireless modems or
WebWeb--enabled handheld computers or enabled handheld computers or
devices. Examples, AT&T Wireless, devices. Examples, AT&T Wireless,
GoAmericaGoAmerica, T, T--Mobile, and Mobile, and VerizonVerizon WirelessWireless
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Computers connected to the Internet work Computers connected to the Internet work together to transfer data and information together to transfer data and information around the world using around the world using SERVERS AND SERVERS AND CLIENTSCLIENTS..
TCP/IPTCP/IP: It is the software used on the : It is the software used on the Internet to pass information from machine Internet to pass information from machine to machine and from network to network. to machine and from network to network. It contains two components Internet It contains two components Internet Protocol (IP) and Transmission Control Protocol (IP) and Transmission Control Protocol (TCP)Protocol (TCP)
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�� When connected to the When connected to the Internet, all you have to Internet, all you have to do is key in the Web do is key in the Web address (address (URL, Uniform URL, Uniform Resource LocatorResource Locator) and ) and your your Web BrowserWeb Browser (the (the program you use to program you use to access the Web) contact access the Web) contact the computer where that the computer where that page is stored (the page is stored (the Web Web serverserver).).
The server receives your The server receives your message and sends the message and sends the page by breaking the page by breaking the information up into little information up into little bundles called bundles called packetspackets..
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Each packet has your computer’s address on them Each packet has your computer’s address on them and are looking traveling the Internet looking for and are looking traveling the Internet looking for your computer. If a packet get lost, your your computer. If a packet get lost, your browser will tell the server to send it again. As all browser will tell the server to send it again. As all the packets begin to reach your browser, it the packets begin to reach your browser, it assembles them into a Web page and displays assembles them into a Web page and displays the page to you.the page to you.
Other network computers ( Other network computers ( routers routers ) help send the ) help send the packets on to their destinations and help locate packets on to their destinations and help locate other routes when one becomes broken or other routes when one becomes broken or clogged with traffic.clogged with traffic.
A A Web browserWeb browser is the software that you use to is the software that you use to retrieve and view Web pages. It allows you to retrieve and view Web pages. It allows you to follow hyperlinks to see new documents.follow hyperlinks to see new documents.
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How data might travel using a How data might travel using a
Telephone line connectionTelephone line connection
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IP AddressIP Address:: short for internet short for internet
protocol address, is a number that protocol address, is a number that
uniquely identifies each computer or uniquely identifies each computer or
devise connected to the Internet.devise connected to the Internet.
•• Consist s of 4 groups of numbers, each Consist s of 4 groups of numbers, each
( from 0 to 255) separated by a period . ( from 0 to 255) separated by a period .
(199.95.72.10).(199.95.72.10).
•• The first portion of each IP address The first portion of each IP address
identifies the network and the last identifies the network and the last
portion identifies the specific computerportion identifies the specific computer
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�� Typically, a Typically, a URLURL follows this format and follows this format and contains components named the contains components named the following ways: following ways:
protocolprotocol://://computer.domain.name/computer.domain.name/pathnamepathname//filename.extfilename.ext or or
typeoftransfertypeoftransfer://servername.domain/://servername.domain/directory.subdirectorydirectory.subdirectory//filenamefilename..filetypefiletype
Protocol, domain name, and path to a specific Web Protocol, domain name, and path to a specific Web page or location on a Web.page or location on a Web.
Most Web page URLs begin with http:/. The Most Web page URLs begin with http:/. The httphttpstands for stands for hypertexhypertex transfer protocoltransfer protocol, which is , which is the communications standard that enables pages the communications standard that enables pages to transfer on the Web.to transfer on the Web.
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Domain name:Domain name: is the text version of an is the text version of an IP address.IP address.
�� Every domain name contains a Every domain name contains a toptop--level domain (TLD)level domain (TLD) abbreviation that abbreviation that identifies the type of organization that identifies the type of organization that is associated with the domain.is associated with the domain.
�� The group that assigns and controls The group that assigns and controls TLDsTLDs is the is the Internet Corporation for Internet Corporation for Assigned Names and NumbersAssigned Names and Numbers(ICANN)(ICANN)
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Common ProtocolsCommon Protocols
HowHow
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Common ProtocolsCommon Protocols
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Domain NamesDomain Names
WhereWhere
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Top Level Domain TLDTop Level Domain TLD
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Cont. Top Level Domain TLDCont. Top Level Domain TLD
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PathPath
Who/WhatWho/What
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What is a World Wide Web?What is a World Wide Web?
The most popular internet service. It consists of The most popular internet service. It consists of a worldwide collection of electronic documents. a worldwide collection of electronic documents. Each of these electronic documents on the Web Each of these electronic documents on the Web is called a Web page.is called a Web page.
1.1. Easy to use.Easy to use.
2.2. It is interactive and combines It is interactive and combines
graphics, text, sound, and graphics, text, sound, and
animation.animation.
3.3. It is easy to create the files that It is easy to create the files that
become a Web site. become a Web site.
Why it is so popular?Why it is so popular?
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SummarySummary
How Does the Web Work?How Does the Web Work?
�� Computers request Computers request
information from information from
servers:servers:
•• BrowsersBrowsers on on
computerscomputers use use URLsURLs
((www.disney.comwww.disney.com) to ) to
locate Web pages on locate Web pages on
ServersServers..
•• RoutersRouters locate the locate the
requesting computers requesting computers
and Web servers.and Web servers.
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�� Packets:Packets:
•• ServersServers break break
information into information into
little bundles called little bundles called
packets. packets.
•• RoutersRouters send send
packets to their packets to their
destination.destination.
•• If packets get lost, If packets get lost,
they are requested they are requested
and sent again.and sent again.
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Your Connection to the WebYour Connection to the Web
�� Web browser:Web browser:
•• Puts packets back Puts packets back
together.together.
•• Interprets HTML Interprets HTML
tags on Web tags on Web
pages and pages and
displays Web displays Web
content.content.
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Your Connection to the WebYour Connection to the Web
�� Web browser Web browser
displays:displays:
•• Search tools.Search tools.
•• Hyperlinks to Hyperlinks to
proceed to pages.proceed to pages.
•• Back button to Back button to
return from pages.return from pages.
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Your Connection to the WebYour Connection to the Web
�� Web browser’s Web browser’s parts:parts:•• Navigation buttonsNavigation buttons
•• Address boxAddress box
•• Status iconStatus icon
•• Content areaContent area
•• Status barStatus bar
�� Enter URLs:Enter URLs:•• www.course.comwww.course.com
•• www.geocities.cowww.geocities.comm
•• www.altavista.comwww.altavista.com
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Your Connection to the WebYour Connection to the Web
�� Web indexes and Web indexes and
search tools:search tools:
•• Yahoo!Yahoo!
•• AltaVistaAltaVista
•• GoogleGoogle
�� Enter URLs:Enter URLs:
•• www.yahoo.comwww.yahoo.com
•• www.altavista.comwww.altavista.com
•• www.google.comwww.google.com
An index organizes pages by topics.
Search tools search by keywords.
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How Fast Is the Web?How Fast Is the Web?
Text browsers don’t.
GUI browsers show
pictures.
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How Fast Is the Web?How Fast Is the Web?
�� Web speed is Web speed is
determined by: determined by:
•• Size of Web page.Size of Web page.
•• User’s connection User’s connection
speed.speed.
•• Internet Traffic.Internet Traffic.
•• Server’s Server’s
connection speed.connection speed.
•• Web server speed.Web server speed.
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How Fast Is the Web?How Fast Is the Web?
�� Graphics take Graphics take
longer to load.longer to load.
�� Text pages load Text pages load
faster.faster.
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Making a Simple Web PageMaking a Simple Web Page
�� Web pages are Web pages are
made up of tags: made up of tags:
•• Opening or Opening or
starting tagsstarting tags
•• Angle bracketsAngle brackets
•• Information to be Information to be
displayed in displayed in
content areacontent area
•• Closing tagsClosing tags
Hello, my name is Hello, my name is
____.____.
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Making a Simple Web PageMaking a Simple Web Page
Hello, my name is Hello, my name is
____.____.
�� These tags will These tags will
create this Web create this Web
page.page.
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SummarySummary
In this lesson, you learned:In this lesson, you learned:
�� What the World Wide Web is and how it What the World Wide Web is and how it
works.works.
�� To identify the elements of a Web browser To identify the elements of a Web browser
and explain how the browser works.and explain how the browser works.
�� To determine how fast a Web page loads.To determine how fast a Web page loads.
�� To create a simple Web document.To create a simple Web document.
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The Internet and WWWThe Internet and WWWObjectives:Objectives:
•• Networks LAN/WAN.Networks LAN/WAN.
•• Internet.Internet.
•• How the Internet worksHow the Internet works
•• Explain what the World Wide Web is and Explain what the World Wide Web is and
how it works.how it works.
•• Identify the elements of a Web browser Identify the elements of a Web browser
and explain how the browser works.and explain how the browser works.
•• Tell what determines how fast a Web page Tell what determines how fast a Web page
loads.loads.
•• Create a simple Web document.Create a simple Web document.
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Network:Network:A A computer networkcomputer network is a system for is a system for
communicationcommunication among two or more among two or more
computerscomputers. .
LANLAN ( ( local area network):local area network): is a is a computer networkcomputer networkcovering a local area over short distances , like a covering a local area over short distances , like a home, office or small group of buildings such as a home, office or small group of buildings such as a
college using cables and hardwarecollege using cables and hardware installed on installed on
each computereach computer. . LANs can be interlinked by LANs can be interlinked by connections to form a Wide area network. A connections to form a Wide area network. A routerrouteris used to make the connection between LANs.is used to make the connection between LANs.
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WAN (wide area network):WAN (wide area network): Is a computer Is a computer
network that connects many computers over network that connects many computers over
large distances, using transmission lines large distances, using transmission lines
similar to those used in telephone systems.similar to those used in telephone systems.
Each networking technology moved information Each networking technology moved information
around in a different way, often based on the around in a different way, often based on the
design of its hardware. A particular LAN technology design of its hardware. A particular LAN technology
could only work with specific computers, and most could only work with specific computers, and most
LAN and WAN technologies were incompatible with LAN and WAN technologies were incompatible with
each other.each other.
-
What is the Internet?What is the Internet?
•• It is a computer network that connects It is a computer network that connects
millions of computers globally and millions of computers globally and
provides worldwide communication to provides worldwide communication to
businesses, homes, and governments.businesses, homes, and governments.
How the Internet began?
-
1957
1962
-
1967
1968
-
1969
1970
-
1971
1972
-
1975
1974
-
1981
1979
-
1983
1982
-
1988
1985
-
1989
1990
-
1994
1993
-
1995
1998
-
2000
2003
2001
-
�� In a network a In a network a Host NodeHost Node, or , or HostHost, is , is
any computer that directly connects any computer that directly connects
to the network. A host often stores to the network. A host often stores
and transfers data and messages on and transfers data and messages on
high speed communication lines and high speed communication lines and
provides network connections for provides network connections for
other computers.other computers.
-
Internet ServicesInternet Services
�� World Wide WebWorld Wide Web
�� Electronic mail (eElectronic mail (e--mail)mail)
�� File TransferFile Transfer
�� NewsgroupsNewsgroups
�� Message boardsMessage boards
�� Mailing ListMailing List
�� Chat RoomsChat Rooms
�� Instant MessagingInstant Messaging
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Connecting to the InternetConnecting to the Internet
�� SlowSlow--speed technology:speed technology:
DialDial--up access.up access.
�� HigherHigher--speed Internet connections: speed Internet connections:
DSL (Digital Subscriber Line),DSL (Digital Subscriber Line),
cable modem, cable modem,
fixed wireless, fixed wireless,
satellite modem.satellite modem.
-
Access Access ProvidersProvidersISP (Internet ISP (Internet ServiceService ProviderProvider):): isis a a businessbusiness thatthat has a has a permanentpermanentInternet Internet connectionconnection andand providesprovidestemporarytemporary connectionsconnections toto individualsindividualsandand companiescompanies forfor free free oror forfor a a feefee..
Regional ISPRegional ISP: : UsuallyUsually providesprovides accessaccess toto thetheInternet Internet throughthrough oneone oror more more telephonetelephonenumbersnumbers local local toto anan specificspecific geographicalgeographicalareaarea..
NationalNational ISPISP: : LargeLarge businessbusiness thatthat providesprovideslocal local telephonetelephone numbersnumbers in in mostmost majormajor citiescitiestowntown nationwidenationwide. . ExamplesExamples EarthlinkEarthlink, , AT&TAT&T, , WorldComWorldCom..
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OSP (Online Service Provider):OSP (Online Service Provider):
Supplies Internet access but also has Supplies Internet access but also has
many membersmany members--only features that only features that
offer a variety of special content and offer a variety of special content and
services such as: news, weather, services such as: news, weather,
legal information, financial data, legal information, financial data,
hardware and software guides, hardware and software guides,
games and travel guides. Examples. games and travel guides. Examples.
AOL, MSN.AOL, MSN.
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WSP (Wireless Service Provider):WSP (Wireless Service Provider):
Is a company that provides wireless Internet Is a company that provides wireless Internet
access to users with wireless modems or access to users with wireless modems or
WebWeb--enabled handheld computers or enabled handheld computers or
devices. Examples, AT&T Wireless, devices. Examples, AT&T Wireless,
GoAmericaGoAmerica, T, T--Mobile, and Mobile, and VerizonVerizon WirelessWireless
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Computers connected to the Internet work Computers connected to the Internet work together to transfer data and information together to transfer data and information around the world using around the world using SERVERS AND SERVERS AND CLIENTSCLIENTS..
TCP/IPTCP/IP: It is the software used on the : It is the software used on the Internet to pass information from machine Internet to pass information from machine to machine and from network to network. to machine and from network to network. It contains two components Internet It contains two components Internet Protocol (IP) and Transmission Control Protocol (IP) and Transmission Control Protocol (TCP)Protocol (TCP)
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�� When connected to the When connected to the Internet, all you have to Internet, all you have to do is key in the Web do is key in the Web address (address (URL, Uniform URL, Uniform Resource LocatorResource Locator) and ) and your your Web BrowserWeb Browser (the (the program you use to program you use to access the Web) contact access the Web) contact the computer where that the computer where that page is stored (the page is stored (the Web Web serverserver).).
The server receives your The server receives your message and sends the message and sends the page by breaking the page by breaking the information up into little information up into little bundles called bundles called packetspackets..
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Each packet has your computer’s address on them Each packet has your computer’s address on them and are looking traveling the Internet looking for and are looking traveling the Internet looking for your computer. If a packet get lost, your your computer. If a packet get lost, your browser will tell the server to send it again. As all browser will tell the server to send it again. As all the packets begin to reach your browser, it the packets begin to reach your browser, it assembles them into a Web page and displays assembles them into a Web page and displays the page to you.the page to you.
Other network computers ( Other network computers ( routers routers ) help send the ) help send the packets on to their destinations and help locate packets on to their destinations and help locate other routes when one becomes broken or other routes when one becomes broken or clogged with traffic.clogged with traffic.
A A Web browserWeb browser is the software that you use to is the software that you use to retrieve and view Web pages. It allows you to retrieve and view Web pages. It allows you to follow hyperlinks to see new documents.follow hyperlinks to see new documents.
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How data might travel using a How data might travel using a
Telephone line connectionTelephone line connection
-
IP AddressIP Address:: short for internet short for internet
protocol address, is a number that protocol address, is a number that
uniquely identifies each computer or uniquely identifies each computer or
devise connected to the Internet.devise connected to the Internet.
•• Consist s of 4 groups of numbers, each Consist s of 4 groups of numbers, each
( from 0 to 255) separated by a period . ( from 0 to 255) separated by a period .
(199.95.72.10).(199.95.72.10).
•• The first portion of each IP address The first portion of each IP address
identifies the network and the last identifies the network and the last
portion identifies the specific computerportion identifies the specific computer
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�� Typically, a Typically, a URLURL follows this format and follows this format and contains components named the contains components named the following ways: following ways:
protocolprotocol://://computer.domain.name/computer.domain.name/pathnamepathname//filename.extfilename.ext or or
typeoftransfertypeoftransfer://servername.domain/://servername.domain/directory.subdirectorydirectory.subdirectory//filenamefilename..filetypefiletype
Protocol, domain name, and path to a specific Web Protocol, domain name, and path to a specific Web page or location on a Web.page or location on a Web.
Most Web page URLs begin with http:/. The Most Web page URLs begin with http:/. The httphttpstands for stands for hypertexhypertex transfer protocoltransfer protocol, which is , which is the communications standard that enables pages the communications standard that enables pages to transfer on the Web.to transfer on the Web.
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Domain name:Domain name: is the text version of an is the text version of an IP address.IP address.
�� Every domain name contains a Every domain name contains a toptop--level domain (TLD)level domain (TLD) abbreviation that abbreviation that identifies the type of organization that identifies the type of organization that is associated with the domain.is associated with the domain.
�� The group that assigns and controls The group that assigns and controls TLDsTLDs is the is the Internet Corporation for Internet Corporation for Assigned Names and NumbersAssigned Names and Numbers(ICANN)(ICANN)
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Common ProtocolsCommon Protocols
HowHow
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Common ProtocolsCommon Protocols
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Domain NamesDomain Names
WhereWhere
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Top Level Domain TLDTop Level Domain TLD
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Cont. Top Level Domain TLDCont. Top Level Domain TLD
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PathPath
Who/WhatWho/What
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What is a World Wide Web?What is a World Wide Web?
The most popular internet service. It consists of The most popular internet service. It consists of a worldwide collection of electronic documents. a worldwide collection of electronic documents. Each of these electronic documents on the Web Each of these electronic documents on the Web is called a Web page.is called a Web page.
1.1. Easy to use.Easy to use.
2.2. It is interactive and combines It is interactive and combines
graphics, text, sound, and graphics, text, sound, and
animation.animation.
3.3. It is easy to create the files that It is easy to create the files that
become a Web site. become a Web site.
Why it is so popular?Why it is so popular?
-
SummarySummary
How Does the Web Work?How Does the Web Work?
�� Computers request Computers request
information from information from
servers:servers:
•• BrowsersBrowsers on on
computerscomputers use use URLsURLs
((www.disney.comwww.disney.com) to ) to
locate Web pages on locate Web pages on
ServersServers..
•• RoutersRouters locate the locate the
requesting computers requesting computers
and Web servers.and Web servers.
-
�� Packets:Packets:
•• ServersServers break break
information into information into
little bundles called little bundles called
packets. packets.
•• RoutersRouters send send
packets to their packets to their
destination.destination.
•• If packets get lost, If packets get lost,
they are requested they are requested
and sent again.and sent again.
-
Your Connection to the WebYour Connection to the Web
�� Web browser:Web browser:
•• Puts packets back Puts packets back
together.together.
•• Interprets HTML Interprets HTML
tags on Web tags on Web
pages and pages and
displays Web displays Web
content.content.
-
Your Connection to the WebYour Connection to the Web
�� Web browser Web browser
displays:displays:
•• Search tools.Search tools.
•• Hyperlinks to Hyperlinks to
proceed to pages.proceed to pages.
•• Back button to Back button to
return from pages.return from pages.
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Your Connection to the WebYour Connection to the Web
�� Web browser’s Web browser’s parts:parts:•• Navigation buttonsNavigation buttons
•• Address boxAddress box
•• Status iconStatus icon
•• Content areaContent area
•• Status barStatus bar
�� Enter URLs:Enter URLs:•• www.course.comwww.course.com
•• www.geocities.cowww.geocities.comm
•• www.altavista.comwww.altavista.com
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Your Connection to the WebYour Connection to the Web
�� Web indexes and Web indexes and
search tools:search tools:
•• Yahoo!Yahoo!
•• AltaVistaAltaVista
•• GoogleGoogle
�� Enter URLs:Enter URLs:
•• www.yahoo.comwww.yahoo.com
•• www.altavista.comwww.altavista.com
•• www.google.comwww.google.com
An index organizes pages by topics.
Search tools search by keywords.
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How Fast Is the Web?How Fast Is the Web?
Text browsers don’t.
GUI browsers show
pictures.
-
How Fast Is the Web?How Fast Is the Web?
�� Web speed is Web speed is
determined by: determined by:
•• Size of Web page.Size of Web page.
•• User’s connection User’s connection
speed.speed.
•• Internet Traffic.Internet Traffic.
•• Server’s Server’s
connection speed.connection speed.
•• Web server speed.Web server speed.
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How Fast Is the Web?How Fast Is the Web?
�� Graphics take Graphics take
longer to load.longer to load.
�� Text pages load Text pages load
faster.faster.
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Making a Simple Web PageMaking a Simple Web Page
�� Web pages are Web pages are
made up of tags: made up of tags:
•• Opening or Opening or
starting tagsstarting tags
•• Angle bracketsAngle brackets
•• Information to be Information to be
displayed in displayed in
content areacontent area
•• Closing tagsClosing tags
Hello, my name is Hello, my name is
____.____.
-
Making a Simple Web PageMaking a Simple Web Page
Hello, my name is Hello, my name is
____.____.
�� These tags will These tags will
create this Web create this Web
page.page.
-
SummarySummary
In this lesson, you learned:In this lesson, you learned:
�� What the World Wide Web is and how it What the World Wide Web is and how it
works.works.
�� To identify the elements of a Web browser To identify the elements of a Web browser
and explain how the browser works.and explain how the browser works.
�� To determine how fast a Web page loads.To determine how fast a Web page loads.
�� To create a simple Web document.To create a simple Web document.